About the Diaper Usage Calculator
How many nappies your baby will use per week, month and until potty training — with the cost.
Also known as: nappy calculator, diapers per month, diaper cost calculator.
How to use this calculator
- Enter diapers per day, price per diaper, months until potty training.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Monthly = per day × 30.4
Worked example
Using the values pre-filled in the calculator above:
- Diapers per day = 8
- Price per diaper = 0.25
- Months until potty training = 30
the calculator returns:
- Diapers per month: 244
- Per week: 56
- Total until potty training: 7,306
- Monthly cost: 60.88